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From Erik Scholtz <escho...@argonsoft.de>
Subject Re: mod_perl and Apache::DBI - what happens on request termination
Date Tue, 05 Jun 2012 08:52:54 GMT
André,

thanks for your answer, which confirms my observation on this: Do you 
have documents that will explain this behaviour in detail?

Greetings,
Erik

>> If a http-connection drops (for any reason), while a huge amount of
>> data is loaded from the database to the webserver, will Apache::DBI
>> cancel the loading (means cancel the query) or will it continue
>> loading the data till the end (means finish the execution of the query
>> / not in a transaction) and then become ready for a new request again?
>>
> Generally speaking, a response handler responding to a client HTTP
> request, will not even know that the client<->httpd connection has been
> dropped, before it tries to send something back to the client. Then it
> will get a "write to client socket error". But before that, it will not
> know.
>
> So, if the response handler (which runs your script/program which runs
> the DBI code) is busy doing something with the database server, but not
> writing anything back to the client, it will happily continue doing that
> for as long as it takes.
>
> When it is done talking to the database server, and starts sending the
> data to the client, then it will get the error and probably crash,
> unless it is prepared for such errors and returns nicely.

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